Flask



FIG. 1 is a top perspective view of a flask showing our new design;

FIG. 2 is an exploded view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The dash-dash broken lines in FIG. 2 illustrate portions of the flask that form no part of the claimed design. The dash-dash broken lines in FIG. 8 represent bounds of the claimed design and form no part of the claimed design, and the portions of the flask shown therein form no part of the claimed design. 

CLAIM We claim the ornamental design for a flask, as shown and described. 